Since his tragic death over the weekend, Paul Walker's co-stars and friends have spoken out about his kindness and generosity, and now a California jewelry store clerk is opening up about the time the actor secretly bought a pricy engagement ring for a soldier and his fiancee.

It happened several years ago at a jewelry shop in Santa Barbara when the "Fast & Furious" actor was shopping at the same time as a soldier who had just gotten home from his first tour in Iraq.

Walker apparently overheard the couple talking about the $10,000 engagement ring set and he quietly called the manager of the store over.

"He called the manager and he said, 'Umm, the ring that those people are looking at — put it on my tab,'" King said. "Soon after that, he just left. … To do something like that to a perfect stranger is just unbelievable."